Audacity ACX Check plug-in vs. ACX Audio Lab

Another thing that flummox’s new users is dB values. They appear backwards because they’re negative numbers.

This is why I stopped calling sound values higher and lower and started using louder and quieter.

There are a couple of systems like that. Performance rhythm timing or “latency” works in negative numbers and it will make you want to go lie down for a while after struggling with it.